A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5920-01-587-2675
NSN 6610-01-432-5144
NSN 5930-01-181-5605
NSN 5965-01-339-5321
NSN 6645-00-285-8781
NSN 5925-01-519-8048
NSN 5910-01-231-9628
NSN 5990-01-086-4825
NSN 5950-01-512-1973
NSN 6240-00-612-0883
NSN 5915-01-168-6570
NSN 6620-01-296-9803